Tub scrubber



FIG. 1 is a perspective view of an embodiment of the tub scrubber of the claimed design;

FIG. 2 is a front elevational view of the tub scrubber of FIG. 1;

FIG. 3 is a rear elevational view of the tub scrubber of FIG. 1;

FIG. 4 is a right side elevational view of the tub scrubber of FIG. 1;

FIG. 5 is a left side elevational view of the tub scrubber of FIG. 1;

FIG. 6 is a top plan view of the tub scrubber of FIG. 1; and,

FIG. 7 is a bottom plan view of the tub scrubber of FIG. 1.

The features shown in broken lines are environment only and not part of the claimed design. 

The ornamental design for a tub scrubber, as shown and described. 